I may have mentioned this to you before, but why not have a Pt. 135 operation use their certificate to "sponsor" your eligibility for an SIC type. At my FSI center, I did my initial with another client who was getting a PIC type in the CE-650 for a Pt. 135 job. We explained and asked the operation if they would "sponsor" me for my SIC type and fortunately they did. I just had to do a a V1 cut to a single engine ILS in the simulator. I'm sure that is how Pt 121 does it, obviously under they're own certificate. With the CE-560XL and CE-750, I did take off and landings to receive the SIC type. If your center is not familiar with that, I could talk to my guys and find out more about it. They were new to this method as I was the first intern to go that route.